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Finding the Fourth Proportional to 125,886.30, 188,440.65 and 73,139.10

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Solution

The fourth proportional to 125,886.30, 188,440.65 and 73,139.10 is: 109,482.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,886.30 : 188,440.65 = 73,139.10 : x
  2. Step 2: Convert to fraction form
    125,886.30/188,440.65 = 73,139.10/x
  3. Step 3: Cross multiply
    125,886.30x = 188,440.65 × 73,139.10
  4. Step 4: Simplify right side
    125,886.30x = 13,782,379,544.42
  5. Step 5: Solve for x
    x = 13,782,379,544.42/125,886.30
  6. Step 6: Final answer
    x = 109,482.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.